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34 .Nm sigtimedwait , sigwaitinfo
35 .Nd "wait for queued signals (REALTIME)"
42 .Fa "const sigset_t *restrict set" "siginfo_t *restrict info"
43 .Fa "const struct timespec *restrict timeout"
46 .Fn sigwaitinfo "const sigset_t * restrict set" "siginfo_t * restrict info"
50 system call is equivalent to
52 except that if none of the signals specified by
56 waits for the time interval specified in the
58 structure referenced by
62 structure pointed to by
64 is zero-valued and if none of the signals specified by
68 returns immediately with an error.
77 clock is used to measure the time interval specified by the
83 system call selects the pending signal from the set specified by
85 Should any of multiple pending signals in the range
89 be selected, it shall be the lowest numbered one.
91 selection order between realtime and non-realtime signals, or
92 between multiple pending non-realtime signals, is unspecified.
95 is pending at the time of the call, the calling thread
96 is suspended until one or more signals in
98 become pending or until it is interrupted by an unblocked, caught signal.
102 system call is equivalent to the
114 function is equivalent to
116 except that the selected signal number shall be stored in the
118 member, and the cause of the signal shall be stored in the
125 system calls may return
127 if interrupted by signal, which is not allowed for the
131 If any value is queued to the selected signal, the first such queued
132 value is dequeued and, if the info argument is
134 the value is stored in the
138 The system resource used to queue the signal
139 is released and returned to the system for other use.
140 If no value is queued,
143 member is zero-valued.
144 If no further signals are
145 queued for the selected signal, the pending indication for that signal
148 Upon successful completion (that is, one of the signals specified by
150 is pending or is generated)
154 return the selected signal number.
155 Otherwise, the functions return a value of \-1
156 and set the global variable
158 to indicate the error.
166 No signal specified by set was generated within the specified timeout period.
173 system calls fail if:
176 The wait was interrupted by an unblocked, caught signal.
181 system call may also fail if:
188 value less than zero or greater than or equal
190 Kernel only checks for this error if no signal is pending in set and it
191 is necessary to wait.
200 .Xr pthread_sigmask 3 ,
207 system calls conform to
210 leaves the behavior of